I'm a big fan of my BlackRapid strap. I find the strap across the shoulder to be much more comfortable. It's better for carrying any noticeable amount of weight (for me, any DSLR + lens is more than I would want around my neck), and I find the neck padding of traditional straps makes my neck sweaty and gross. Also, the BlackRapid strap has a bunch of small compartments for things like CF cards and a phone. I should point out, however, that you wouldn't want to use an across-the-shoulder BlackRapid strap with a backpack. I tend to carry other stuff (additional lenses/netbook/etc.) in other across-the-shoulder bags, so the BlackRapid doesn't get in the way. YMMV.

I don't have a black rapid, but I do have a cheap knock-off of it. After using it for a while now I can't imagine anything else. It's really useful during outdoor photoshoots when I spend time messing around with light stands, I don't have to worry where I laid down my camera. Forget putting it around the neck, that's just a pain.

My wife and I both use sliding-type Sunsniper straps, which work like the Black Rapid straps. She prefers the version with the metal cable that reinforces the strap against cutting. I prefer to be able to cut the strap in event of an emergency entanglement situation. I am not sure whether the Sunsniper or the Black Rapid was marketed first, but we found the Sunsniper at a local camera shop first. (Both are simple copies of cavalry carbine slings.) I prefer the lower-profile one-piece Black Rapid mounting point, and purchased one of them as a separate component. If I misplace my Sunsniper, I would be as likely to buy a Black Rapid as a replacement, though the next paragraph will discuss another possibility.

I have temporarily attached a Magpul MS2 sling to a camera, using a Black Rapid attachment point. This is a rifle sling, made for firearms, which is a high-quality product. It is quick-adjustable for length, can be used as a single-point sling, has a quick-release feature, and has been superseded by an improved MS3. I plan to investigate this option further, now that availability of Magpul slings has recently improved. (My one Magpul sling is used for its intended defensive weapon role; I wear a badge and possess weapons for official purposes.)

The Think Tank neck strap works really well on my Nikon FM3A. I have purchased a second one, to try on a heavier Canon DSLR, but have yet to mount it on any of them. There are times a simple neck strap seems more appropriate, and the Think Tank product seems very intelligently-designed.

but for heavier gear like what Im using I modded mine to be more safe because of the strap loosening overtime, I use a simple method to fix that by using safety pins

_________________http://www.AnderssonPhoto.com Equipment: A blend of Canon, Nikon, Yashica, Leica, Voigtlander, Samyang and Sigma. All of which you can see on my website!Wishlist: Leica M 240, Summilux 50 ASPH, Summilux 24 ASPH

oh I also have Cottoncarrier ^^ its a holster thing for cameras, also mounts on ur chest, looks like a mini version of a body armor

_________________http://www.AnderssonPhoto.com Equipment: A blend of Canon, Nikon, Yashica, Leica, Voigtlander, Samyang and Sigma. All of which you can see on my website!Wishlist: Leica M 240, Summilux 50 ASPH, Summilux 24 ASPH

Loved my BlackRapid RS-5 strap, but after I lost it, got the RS-W1 for women, and it's far more comfortable and size-appropriate for me. Just don't forget to give the fastener a twist every once in a while; you never know when it gets loose.

I think looking at the photos on their website it looks very well thought out, I think I would buy one of their straps plus the feedback here in this thread seems quite favourable. The price isn't even that bad, well in my opinion anyway!